^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * max6639.c - Support for Maxim MAX6639
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * 2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2010, 2011 Roland Stigge <stigge@antcom.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * based on the initial MAX6639 support from semptian.net
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * by He Changqing <hechangqing@semptian.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/platform_data/max6639.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* Addresses to scan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* The MAX6639 registers, valid channel numbers: 0, 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MAX6639_REG_TEMP(ch) (0x00 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define MAX6639_REG_STATUS 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define MAX6639_REG_OUTPUT_MASK 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define MAX6639_REG_GCONFIG 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define MAX6639_REG_TEMP_EXT(ch) (0x05 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define MAX6639_REG_ALERT_LIMIT(ch) (0x08 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define MAX6639_REG_OT_LIMIT(ch) (0x0A + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define MAX6639_REG_THERM_LIMIT(ch) (0x0C + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define MAX6639_REG_FAN_CONFIG1(ch) (0x10 + (ch) * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define MAX6639_REG_FAN_CONFIG2a(ch) (0x11 + (ch) * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define MAX6639_REG_FAN_CONFIG2b(ch) (0x12 + (ch) * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define MAX6639_REG_FAN_CONFIG3(ch) (0x13 + (ch) * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define MAX6639_REG_FAN_CNT(ch) (0x20 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define MAX6639_REG_TARGET_CNT(ch) (0x22 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define MAX6639_REG_FAN_PPR(ch) (0x24 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define MAX6639_REG_TARGTDUTY(ch) (0x26 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MAX6639_REG_FAN_START_TEMP(ch) (0x28 + (ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define MAX6639_REG_DEVID 0x3D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define MAX6639_REG_MANUID 0x3E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define MAX6639_REG_DEVREV 0x3F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* Register bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define MAX6639_GCONFIG_STANDBY 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define MAX6639_GCONFIG_POR 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define MAX6639_GCONFIG_DISABLE_TIMEOUT 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define MAX6639_GCONFIG_CH2_LOCAL 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define MAX6639_GCONFIG_PWM_FREQ_HI 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MAX6639_FAN_CONFIG1_PWM 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define MAX6639_FAN_CONFIG3_THERM_FULL_SPEED 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 0 : (rpm_ranges[rpm_range] * 30) / (val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define TEMP_LIMIT_TO_REG(val) clamp_val((val) / 1000, 0, 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * Client data (each client gets its own)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct max6639_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) char valid; /* !=0 if following fields are valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned long last_updated; /* In jiffies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* Register values sampled regularly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) bool temp_fault[2]; /* Detected temperature diode failure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 fan[2]; /* Register value: TACH count for fans >=30 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u8 status; /* Detected channel alarms and fan failures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* Register values only written to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) u8 pwm[2]; /* Register value: Duty cycle 0..120 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* Register values initialized only once */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u8 rpm_range; /* Index in above rpm_ranges table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static struct max6639_data *max6639_update_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct max6639_data *ret = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int status_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) dev_dbg(&client->dev, "Starting max6639 update\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) status_reg = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) MAX6639_REG_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (status_reg < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ret = ERR_PTR(status_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) data->status = status_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) for (i = 0; i < 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) res = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) MAX6639_REG_FAN_CNT(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (res < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ret = ERR_PTR(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) data->fan[i] = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) res = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) MAX6639_REG_TEMP_EXT(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (res < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = ERR_PTR(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) data->temp[i] = res >> 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) data->temp_fault[i] = res & 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) res = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) MAX6639_REG_TEMP(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (res < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = ERR_PTR(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) data->temp[i] |= res << 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) data->last_updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) data->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) abort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static ssize_t temp_input_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) long temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct max6639_data *data = max6639_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) temp = data->temp[attr->index] * 125;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return sprintf(buf, "%ld\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static ssize_t temp_fault_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct max6639_data *data = max6639_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return sprintf(buf, "%d\n", data->temp_fault[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static ssize_t temp_max_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return sprintf(buf, "%d\n", (data->temp_therm[attr->index] * 1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static ssize_t temp_max_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct device_attribute *dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) res = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) data->temp_therm[attr->index] = TEMP_LIMIT_TO_REG(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) MAX6639_REG_THERM_LIMIT(attr->index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) data->temp_therm[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static ssize_t temp_crit_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return sprintf(buf, "%d\n", (data->temp_alert[attr->index] * 1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static ssize_t temp_crit_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct device_attribute *dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) res = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) data->temp_alert[attr->index] = TEMP_LIMIT_TO_REG(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) MAX6639_REG_ALERT_LIMIT(attr->index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) data->temp_alert[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static ssize_t temp_emergency_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct device_attribute *dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return sprintf(buf, "%d\n", (data->temp_ot[attr->index] * 1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static ssize_t temp_emergency_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct device_attribute *dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) res = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) data->temp_ot[attr->index] = TEMP_LIMIT_TO_REG(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) MAX6639_REG_OT_LIMIT(attr->index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) data->temp_ot[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static ssize_t pwm_show(struct device *dev, struct device_attribute *dev_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static ssize_t pwm_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct device_attribute *dev_attr, const char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct max6639_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) res = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) val = clamp_val(val, 0, 255);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) data->pwm[attr->index] = (u8)(val * 120 / 255);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) MAX6639_REG_TARGTDUTY(attr->index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) data->pwm[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static ssize_t fan_input_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct max6639_data *data = max6639_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) data->rpm_range));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static ssize_t alarm_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct device_attribute *dev_attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct max6639_data *data = max6639_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return sprintf(buf, "%d\n", !!(data->status & (1 << attr->index)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp_crit, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp_crit, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static SENSOR_DEVICE_ATTR_RW(temp1_emergency, temp_emergency, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static SENSOR_DEVICE_ATTR_RW(temp2_emergency, temp_emergency, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static SENSOR_DEVICE_ATTR_RO(fan1_fault, alarm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static SENSOR_DEVICE_ATTR_RO(fan2_fault, alarm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static SENSOR_DEVICE_ATTR_RO(temp1_emergency_alarm, alarm, 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static SENSOR_DEVICE_ATTR_RO(temp2_emergency_alarm, alarm, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) static struct attribute *max6639_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) &sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) &sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) &sensor_dev_attr_temp1_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) &sensor_dev_attr_temp2_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) &sensor_dev_attr_temp1_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) &sensor_dev_attr_temp2_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) &sensor_dev_attr_temp1_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) &sensor_dev_attr_temp2_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) &sensor_dev_attr_temp1_emergency.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) &sensor_dev_attr_temp2_emergency.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) &sensor_dev_attr_pwm1.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) &sensor_dev_attr_pwm2.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) &sensor_dev_attr_fan1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) &sensor_dev_attr_fan2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) &sensor_dev_attr_fan1_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) &sensor_dev_attr_fan2_fault.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) ATTRIBUTE_GROUPS(max6639);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) * returns respective index in rpm_ranges table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * 1 by default on invalid range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static int rpm_range_to_reg(int range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) for (i = 0; i < ARRAY_SIZE(rpm_ranges); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (rpm_ranges[i] == range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return 1; /* default: 4000 RPM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static int max6639_init_client(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct max6639_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) struct max6639_platform_data *max6639_info =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) dev_get_platdata(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) int rpm_range = 1; /* default: 4000 RPM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) /* Reset chip to default values, see below for GCONFIG setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MAX6639_GCONFIG_POR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) /* Fans pulse per revolution is 2 by default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (max6639_info && max6639_info->ppr > 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) max6639_info->ppr < 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) data->ppr = max6639_info->ppr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) data->ppr = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) data->ppr -= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (max6639_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) rpm_range = rpm_range_to_reg(max6639_info->rpm_range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) data->rpm_range = rpm_range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) for (i = 0; i < 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* Set Fan pulse per revolution */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) MAX6639_REG_FAN_PPR(i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) data->ppr << 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /* Fans config PWM, RPM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) MAX6639_REG_FAN_CONFIG1(i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) MAX6639_FAN_CONFIG1_PWM | rpm_range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* Fans PWM polarity high by default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (max6639_info && max6639_info->pwm_polarity == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) MAX6639_REG_FAN_CONFIG2a(i), 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) MAX6639_REG_FAN_CONFIG2a(i), 0x02);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * /THERM full speed enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * PWM frequency 25kHz, see also GCONFIG below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) MAX6639_REG_FAN_CONFIG3(i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) MAX6639_FAN_CONFIG3_THERM_FULL_SPEED | 0x03);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) /* Max. temp. 80C/90C/100C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) data->temp_therm[i] = 80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) data->temp_alert[i] = 90;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) data->temp_ot[i] = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) MAX6639_REG_THERM_LIMIT(i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) data->temp_therm[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) MAX6639_REG_ALERT_LIMIT(i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) data->temp_alert[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) MAX6639_REG_OT_LIMIT(i), data->temp_ot[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) /* PWM 120/120 (i.e. 100%) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) data->pwm[i] = 120;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) err = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) MAX6639_REG_TARGTDUTY(i), data->pwm[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) /* Start monitoring */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) MAX6639_GCONFIG_DISABLE_TIMEOUT | MAX6639_GCONFIG_CH2_LOCAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) MAX6639_GCONFIG_PWM_FREQ_HI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /* Return 0 if detection is successful, -ENODEV otherwise */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static int max6639_detect(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct i2c_board_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) struct i2c_adapter *adapter = client->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int dev_id, manu_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /* Actual detection via device and manufacturer ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) dev_id = i2c_smbus_read_byte_data(client, MAX6639_REG_DEVID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) manu_id = i2c_smbus_read_byte_data(client, MAX6639_REG_MANUID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) if (dev_id != 0x58 || manu_id != 0x4D)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) strlcpy(info->type, "max6639", I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) static int max6639_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) struct max6639_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) data = devm_kzalloc(dev, sizeof(struct max6639_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) mutex_init(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) /* Initialize the max6639 chip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) err = max6639_init_client(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) max6639_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static int max6639_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) int data = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (data < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) return i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) MAX6639_REG_GCONFIG, data | MAX6639_GCONFIG_STANDBY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) static int max6639_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) int data = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (data < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) MAX6639_REG_GCONFIG, data & ~MAX6639_GCONFIG_STANDBY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) #endif /* CONFIG_PM_SLEEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) static const struct i2c_device_id max6639_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) {"max6639", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) MODULE_DEVICE_TABLE(i2c, max6639_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) static SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) static struct i2c_driver max6639_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) .class = I2C_CLASS_HWMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) .name = "max6639",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) .pm = &max6639_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) .probe_new = max6639_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) .id_table = max6639_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) .detect = max6639_detect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) .address_list = normal_i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) module_i2c_driver(max6639_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) MODULE_DESCRIPTION("max6639 driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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